Ecological Effects of Returning Farmland to Forest Land in the Loess Gully and Hilly Region

JIA Xiao-juan; CHANG Qing-rui; XUE A-liang; YU Lin; WANG De-cai

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Ecological Effects of Returning Farmland to Forest Land in the Loess Gully and Hilly Region

- Ecological Effects of Returning Farmland to Forest Land in the Loess Gully and Hilly Region
- Bulletin of Soiland Water Conservation Vol. 27, Issue 3, Pages: 182-185(2008)
- 作者机构：
  
  西北农林科技大学资源环境学院, 陕西杨凌,712100
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- Published：2008
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JIA Xiao-juan, CHANG Qing-rui, XUE A-liang, et al. Ecological Effects of Returning Farmland to Forest Land in the Loess Gully and Hilly Region[J]. Bulletin of Soiland Water Conservation, 2008, 27(3): 182-185.
DOI：

JIA Xiao-juan, CHANG Qing-rui, XUE A-liang, et al. Ecological Effects of Returning Farmland to Forest Land in the Loess Gully and Hilly Region[J]. Bulletin of Soiland Water Conservation, 2008, 27(3): 182-185. DOI：

摘要

基于1986

2003年两期遥感影像解译获得的吴起县土地利用变化数据

采用生态系统价值衡量土地利用类型相对生态价值

对吴起县退耕还林的生态效应进行了综合评价。(1)1986—2003年间

吴起县土地利用类型发生了显著变化。林地、草地面积显著增加

耕地面积大幅度减少

其中

63.55%的耕地转换成林地和草地。(2)吴起县的生态环境指数从0.507上升到0.747

生态环境指数明显增加。其中

林地对区域生态环境指数增长贡献明显

从0.058增长到0.368

说明吴起县退耕还林还草带来了较好的生态效应

整体的生态环境质量得到了极大改善。

Abstract

Based on landuse change data obtained from TM images in 1986 and 2003 and the relative ecological values of corresponding landuse types

we evaluated ecological effects of returning farmland to forest or grass land in Wuqi County. Results show that landuse types in the county were in a significant change during 1986-2003.The total area of woodland and grassland has increased greatly while the area of farmland and unused land has significantly reduced.There was 63.55% of farmland transferred into woodland and grassland.Ecological environment has been significantly improved and overall environmental quality has been remarkably improved.Ecological contribution rate of returning farmland to forest is 40.96%. Projects of returning farmland to forest land in Wuqi County have achieved success and brought wonderful ecological effects.

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Comprehensive Evaluation on Eco-environmental Quality of Wuqi County, Shaanxi Province

Implementation of Policies for Converting Cultivated Land into Forestland/ Grassland in Wuqi County

A Rural Household Survey on Living Security of Farmers After Grain for Green Project in Wuqi County

Prediction of the Suitable Area of the Grain for Forest and Grass Project in Wuqi County Based on Grey Theory

Evolutionary Processes in Agricultural Eco2economic System of Wuqi County After Converting Slope Farmland into Forest and Grassland

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